This is 4chan's /diy/ OP for whenever they start an electronics general thread. I thought it may be useful for someone that would happen upon this board that otherwise woudn't have found this info if they no longer browse 4chan itself.

>I'm new to electronics, where to get started?

There are several good books and YouTube channels that are commonly recommended for beginners and those wanting to learn more, many with advanced techniques. The best way to get involved in electronics is just to make stuff. Don't be afraid to get your hands dirty.

I haven't really looked thoroughly through these books, but if I recall, they looked nice enough. The first few things you want to understand are things like current, voltage, resistance and ohm's law. V=IR. Build simple resistor circuits and understand how they work,then slowly add fun things like variable resistors, LEDs (diodes), capacitors, and simple chips like the 555, and logic gates.

To do it in a pointed direction you would most likely need a specialized microwave generator like a vircator.

Otherwise the electromagnetic radiation of sufficient force to work over a range to damage electronics would be penetrating in every direction unless inside a faraday cage in which case it wouldn't penetrate the cage itself.

Also electronics shielded by faraday cages would be unaffected.

All of that said, you would need a lot of power to fire the device. Electromagnetic pulses can occur when a big power transformer blows but those again affect all directions from the transformer. Most professional devices produce explosions to create a strong enough effect.

You might need a megawatt or more for the pulse for it to be effective. You could maybe use some kilowatts or less but then you might have to be really close to the target.

I've seen this implemented on other boards and chans with a slow post rate and I thought it would be a good idea to do it here as well.

In this thread you are encouraged to post anything you want, pictures, webms, un/finished projects, questions, stories, opinions… it doesn't matters what, as long as it is remotely related to the board.

The objective is to increase the post rate to get users to come back regularly not only to check their posts, but also other users' posts, hopefully participating in other threads more often, creating a chain reaction and thus kickstarting the community, since the current post rate must be around 3-5 posts per week.

On the same note as >>106, do you think there will ever be FPGAs with open bitstreams? Seeing as the reverse engineering of the iCE40 hasn't lead to an instant revolution and everyone jumping on board I'm skeptical.

But it would be nice, maybe for small devices or something. The GreenPAKs almost already qualify, but they're so small to be almost useless.

A few interesting things in this– it mentions 'solid' (Lithium) battery research, has a ZX80 advertisement (and heaps of other ancient computers!), and more Dick Smith Electronics ads than you can shake your.. dick at.

Advice on key hole camera that can fit into a fish eyeDivider03/05/17 (Sun) 14:28:26No.283[Reply]

I have a neighbor that dumps trash outside my front door and I need tips on if there are any key hole camera with high dpi and that can pick up audio which I can fit into the fish eye in my front door.

Nobody uses TTL, it's been replaced by CMOS. If you just want to start assembling basic logic circuits, you can probably just read something on how logic gates work, assemble a few circuits from tutorials, and then start designing your own circuits.

If you really want to do this, get copies of the old Forest M Mims books, Engineer's Notebook and similar titles. There is value in playing with those chips still, there are still applications for them and sure they aren't cutting edge anymore but you learn how things work, using them like building blocks, hands on, things you can put a meter on and understand it. Learn about logic gates and how they're assembled from transistors, learn how NAND gates can be assembled into almost anything logical (XORs are nice too). Learn about level shifters to interface 5v and 3.3v logic, and 5v to +12v / -12v for RS-232. Learn how gates build simple adders and counters, and how simple adders and counters build CPUs. At some point you're probably going to want to jump from putting TTL chips on breadboards to building things with gates on FPGA's and you can actually freaking build your own CPU out of a programmable chip. (You can do it with TTL too, but in this day and age only do that if you are a true autist). Grab an Arduino and play with it… then learn to use Atmel or PICs without the hand-holding of the IDE. Learn 8 and 16 bit assembly. And pick up something about the mechanical aspect of "how things work", too. Because what good is a microcontroller that can't click a solenoid to unlock a door or spin a stepper motor with a screw-drive to move a cutting tool on a lathe. Take some shit apart… learn how it works… repurpose it to do what you want. Watch some vids on youtube of what poo-in-the-loos do in their spare time… those kids play with this stuff and build things and become engineers, like American kids did in the past. I recommend "how to build a" as a search phrase to get you started.

>What is in general the difference between an AUX jack and some other audio jacks?

I don't know much about this, but I assume the differences are only physical, since they all have left channel, right channel and ground. With RCA you need two wires, usually white and red, one for right and the other for left, and the outer crown is ground.

>and the old one has some good speakers, but they have some weirds ass jacks.

that's too safe, if I had another microwave id totally attach the magnetron to a wave guide, 1000~ watts of directed microwaves, bby. sadly I blew up my last magnetron so that project will have to wait. ;-;

If you're willing to modify the transformer, you can turn it into a spot welder. If you wire it all back together and put a wave guide on the magnetron, then you can do cool stuff like turning on light bulbs from ~15 feet away. If you know how to do it right, you can charge the supercapacitor with enough juice to hurt like hell, but not kill someone. Wire it up to a glove or something and you're a walking taser.